Road Surface Characteristics and Condition: Effects on Road Users
- Published: ARRB Transport Research Ltd, 1998
- Authors: J. McLean and G. Foley
- Date Added: 06 Mar 2013
- Last Update: 06 Mar 2013
To provide a review of the effects of road surface type and condition on safety, vehicle operating costs and noise generation.
The skid resistance offered by a wet road surface decreases with increasing travel speeds.
At low speeds surface aggregate microtexture is the primary contributor to skid resistance.
Macrotexture and water film thickness influence the extent to which skid resistance decreases with increasing travel speed.
Wet weather RTI rates increase with decreasing skid resistance.
For rural arterial roads, wet weather RTI rates increase markedly for SCRIM measured Side Force Co-efficients less than 0.5.
European and US research has found that for rural roads with asphalt concrete surfaces, RTIs typically increase by about 5 per cent after resurfacing projects.
Skid resistance, Wet surface
Australian-based research but included as relevant to UK.